In our own server we have combined the plugin system in Fadd with the webserver to be able to add functionality to the website using external DLL.s.
You can read about the plugin system here: http://www.codeproject.com/KB/macros/pluginsystem.aspx

When I have time I'll make a more complete example project using plugins and the webserver.

Yeah, thanks, i got the simple thing running.
How do I serve MVC stuff to just "/" address? Do i have to do a custom redirect from there? It's not a big deal, since it's an internal application monitoring service..